Within a Remote Desktop Manager embedded session is the option to display multiple tabbed windows simultaneously. As illustrated below, select and hold down on a tab and drag it towards the center of the screen to access the four-sided directional control. Aim the directional control to anchor the tab to the top, bottom, left or right of the adjacent tab.
Split Window - Drag And Drop
Below is an example of a side-by-side split window.
Split Window - Side-By-Side
Below is an example of a top-down split window.